Enantiodromia

Enantiodromia, the principle enunciated by Heraclitus, where the deepest saturation of darkness gives birth to a rapidly expanding point of light. Frame of reference in these glass books are The Revelation, after the opening of the 7th seal.

To him that overcometh will I give to eat of the hidden manna

And the sun became black as sackcloth of hair, and the moon became as blood